ASQ CSSBB Exam - Topic 8 Question 125 Discussion

Actual exam question for ASQ's CSSBB exam

Question #: 125
Topic #: 8

SCENARIO

A Six Sigma team is measuring the moisture content of corn starch as it leaves the conveyer belt of a dryer. They collect one sample four cups of starch at times indicated in the chart at fixed locations labeled A, B, C, and D across the end of the belt. See the diagram below.

Find the equation of the regression line for these sample data points:

(1, 7) (3, 3) ( 3, 2) (5, --1)

Ay = 10.8 -- 2.9x

By = 12.9 + 5.2x

Cy = 16 -- 3.7x

Dy = 8.75 -- 2x

Ey = 22.6 -- 4.8x

Show Suggested Answer

Suggested Answer: D

by Inocencia at May 02, 2026, 05:41 AM

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Louann

2 hours ago

Wait, how can moisture content be negative?

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Carin

5 days ago

I think option A looks right!

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German

10 days ago

The points are (1, 7), (3, 3), (3, 2), (5, -1).

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Adelina

16 days ago

I feel like I need to double-check my calculations for the slope and intercept. I hope I remember the right steps from our last review session!

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Erin

2 months ago

This reminds me of a similar question we did in class where we had to find the best fit line. I think I might lean towards option A, but I'm not completely confident.

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Nobuko

2 months ago

I think the equation should be in the form y = mx + b, but I can't recall how to calculate the slope correctly for these points.

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Cheryll

2 months ago

I remember we practiced finding regression lines, but I'm not sure how to handle the negative value in the data set.

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